[PR #3955] Refactor OrbisFiber to match PS4 layout and obfuscation #3822

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opened 2026-02-27 22:05:07 +03:00 by kerem · 0 comments

kerem commented

2026-02-27 22:05:07 +03:00

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📋 Pull Request Information

Original PR: https://github.com/shadps4-emu/shadPS4/pull/3955
Author: @w1naenator
Created: 1/24/2026
Status: 🔄 Open

Base: main ← Head: gr2fix

📝 Commits (10+)

ac9d816 Refactor OrbisFiber to match PS4 layout and obfuscation
da7d52c Merge branch 'main' into gr2fix
8a01876 Add Ulobjmgr integration and enhance fiber management
a7b4ba4 clang
fc9cde2 Merge branch 'gr2fix' of https://github.com/w1naenator/shadPS4 into gr2fix
19ce9ac Add Mach-O support for fiber switching and stack management
90e075e Enhance Mach-O fiber switching functions with visibility attributes
7b41512 clang
63f07a8 Enhance Mach-O fiber switching functions with externally visible attributes
c1cabf8 Update fiber handling for Mach-O with visibility attributes and adjust compile options for Apple

📊 Changes

11 files changed (+644 additions, -164 deletions)

View changed files

📝 CMakeLists.txt (+3 -0)
📝 src/common/logging/filter.cpp (+1 -0)
📝 src/common/logging/types.h (+1 -0)
📝 src/core/libraries/fiber/fiber.cpp (+492 -76)
📝 src/core/libraries/fiber/fiber.h (+65 -32)
📝 src/core/libraries/fiber/fiber_context.s (+59 -54)
📝 src/core/libraries/kernel/memory.h (+2 -0)
📝 src/core/libraries/kernel/threads/pthread.h (+2 -0)
📝 src/core/libraries/razor_cpu/razor_cpu.h (+4 -1)
📝 src/core/libraries/ulobjmgr/ulobjmgr.cpp (+5 -0)
📝 src/core/libraries/ulobjmgr/ulobjmgr.h (+10 -1)

📄 Description

Redesign OrbisFiber struct to match PS4's internal layout, including new fields, padding, and explicit size/alignment checks.
Store entry, arg_on_initialize, and name in obfuscated (XORed) form; add helper functions for encoding/decoding.
Replace plain name string with XORed byte array and per-fiber randomization.
Add random_pad field, filled with pseudo-random data on init.
Use atomic helpers for fiber state transitions instead of direct atomic access.
Update all code to use new accessors for obfuscated fields.
Improve stack overflow and context size margin checks.
Zero-initialize OrbisFiberOptParam in its initializer.
Add and includes for new memory operations.
Miscellaneous bug fixes and code cleanup.

_{🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.}

## 📋 Pull Request Information **Original PR:** https://github.com/shadps4-emu/shadPS4/pull/3955 **Author:** [@w1naenator](https://github.com/w1naenator) **Created:** 1/24/2026 **Status:** 🔄 Open **Base:** `main` ← **Head:** `gr2fix` --- ### 📝 Commits (10+) - [`ac9d816`](https://github.com/shadps4-emu/shadPS4/commit/ac9d816db5022a5188703063d50547c0fd4b25f0) Refactor OrbisFiber to match PS4 layout and obfuscation - [`da7d52c`](https://github.com/shadps4-emu/shadPS4/commit/da7d52c7c920bb1cb7b840d1bcadab6c55e5d052) Merge branch 'main' into gr2fix - [`8a01876`](https://github.com/shadps4-emu/shadPS4/commit/8a0187685d25ee753856811ec91d77bdac90d80d) Add Ulobjmgr integration and enhance fiber management - [`a7b4ba4`](https://github.com/shadps4-emu/shadPS4/commit/a7b4ba469f4082142dfd7c16f2f4df4b2f7c0ff8) clang - [`fc9cde2`](https://github.com/shadps4-emu/shadPS4/commit/fc9cde2f51d9a7232957d368ecccf58824fce948) Merge branch 'gr2fix' of https://github.com/w1naenator/shadPS4 into gr2fix - [`19ce9ac`](https://github.com/shadps4-emu/shadPS4/commit/19ce9ac146b07ac54a9548e00511de80cd327ec2) Add Mach-O support for fiber switching and stack management - [`90e075e`](https://github.com/shadps4-emu/shadPS4/commit/90e075ea52598f6902ecb5d69c702d0b18362bb2) Enhance Mach-O fiber switching functions with visibility attributes - [`7b41512`](https://github.com/shadps4-emu/shadPS4/commit/7b41512f9c317b64ca06fd000d5262b6fac5303b) clang - [`63f07a8`](https://github.com/shadps4-emu/shadPS4/commit/63f07a83032c2101ab6d467676941a39b712320e) Enhance Mach-O fiber switching functions with externally visible attributes - [`c1cabf8`](https://github.com/shadps4-emu/shadPS4/commit/c1cabf872b2579521653dced56ebcbdac0d692d9) Update fiber handling for Mach-O with visibility attributes and adjust compile options for Apple ### 📊 Changes **11 files changed** (+644 additions, -164 deletions) <details> <summary>View changed files</summary> 📝 `CMakeLists.txt` (+3 -0) 📝 `src/common/logging/filter.cpp` (+1 -0) 📝 `src/common/logging/types.h` (+1 -0) 📝 `src/core/libraries/fiber/fiber.cpp` (+492 -76) 📝 `src/core/libraries/fiber/fiber.h` (+65 -32) 📝 `src/core/libraries/fiber/fiber_context.s` (+59 -54) 📝 `src/core/libraries/kernel/memory.h` (+2 -0) 📝 `src/core/libraries/kernel/threads/pthread.h` (+2 -0) 📝 `src/core/libraries/razor_cpu/razor_cpu.h` (+4 -1) 📝 `src/core/libraries/ulobjmgr/ulobjmgr.cpp` (+5 -0) 📝 `src/core/libraries/ulobjmgr/ulobjmgr.h` (+10 -1) </details> ### 📄 Description - Redesign OrbisFiber struct to match PS4's internal layout, including new fields, padding, and explicit size/alignment checks. - Store entry, arg_on_initialize, and name in obfuscated (XORed) form; add helper functions for encoding/decoding. - Replace plain name string with XORed byte array and per-fiber randomization. - Add random_pad field, filled with pseudo-random data on init. - Use atomic helpers for fiber state transitions instead of direct atomic access. - Update all code to use new accessors for obfuscated fields. - Improve stack overflow and context size margin checks. - Zero-initialize OrbisFiberOptParam in its initializer. - Add <cstring> and <cstddef> includes for new memory operations. - Miscellaneous bug fixes and code cleanup. --- <sub>🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.</sub>